Hydrogen-gas-compatible fully welded buried steel valve
A 150A fully welded steel shutoff valve developed for hydrogen-gas pipeline installation, using a butt-weld connection and intended for direct buried service.
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Problem solved
Provides a buried pipeline shutoff point for low-pressure hydrogen distribution where welded connection, seal integrity, ground movement, vibration, dust, corrosion protection, and limited maintenance access are constraints.
Application contexts
- Hydrogen pipeline between a hydrogen station and a power-generation facility
- Low-pressure hydrogen distribution infrastructure
Technical principle
The disclosed product uses a fully welded body, butt-weld pipe connection, and full-bore configuration. KYOSEI's established buried steel-valve design describes a soft-seal and metal-seat twin-seat structure with four upstream/downstream sealing positions and fluid-pressure self-sealing; the hydrogen page does not disclose whether every underlying feature is unchanged for the hydrogen model.
Typical use cases
- Buried shutoff valve in low-pressure hydrogen pipeline segments
- Hydrogen transfer pipeline connecting station infrastructure to generation equipment
Partnership route
How global engineering teams typically engage this asset.
Helpful to include: pipeline pressure and hydrogen purity · required pipe size and butt-weld specification · burial environment and corrosion-protection requirement · required leak-test method and acceptance criteria · applicable national and project standards
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Source & provenance
Translation review status: unreviewed. Publication does not establish technical verification or supplier endorsement.
Original language: JA.
Record updated: .
- Hydrogen-gas-compatible fully welded buried steel valve
https://www.kyosei.com/magazine/productgoods/%E6%B0%B4%E7%B4%A0%E3%83%90%E3%83%AB%E3%83%96/
Primary-source candidate; evidence review: pending.
Source accessed / recorded (collector timestamp): .
Source publication date: Not recorded.
- Fully welded buried steel valve [WS type]
https://www.kyosei.com/product/gas/valve/a_welded_ws/
Supporting / discovery source; evidence review: pending.
Source accessed / recorded (collector timestamp): .
Source publication date: Not recorded.
Collector timestamps record when a source was stored, not an independent verification date. Source links provide context; they do not validate every specification, readiness label, certification, or proposed partnership route.